42643301 has 2 divisors, whose sum is σ = 42643302. Its totient is φ = 42643300.

The previous prime is 42643291. The next prime is 42643303. The reversal of 42643301 is 10334624.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 2401 = 6530^2 + 49^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42643301 is a prime.

It is a super-2 number, since 2×42643301² = 3636902240353202, which contains 22 as substring.

Together with 42643303, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42643303) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21321650 + 21321651.

It is an arithmetic number, because the mean of its divisors is an integer number (21321651).

Almost surely, 2^42643301 is an apocalyptic number.

It is an amenable number.

42643301 is a deficient number, since it is larger than the sum of its proper divisors (1).

42643301 is an equidigital number, since it uses as much as digits as its factorization.

42643301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 42643301 is about 6530.1838412100. The cubic root of 42643301 is about 349.3683874035.

Adding to 42643301 its reverse (10334624), we get a palindrome (52977925).

The spelling of 42643301 in words is "forty-two million, six hundred forty-three thousand, three hundred one".